成果報告書詳細
管理番号20100000002262
タイトル*平成21年度中間年報 新エネルギー技術フィールドテスト事業 地域バイオマス熱利用フィールドテスト事業 廃棄日本酒を対象とした低濃度バイオエタノールの熱利用実証試験事業
公開日2011/5/17
報告書年度2009 - 2009
委託先名白鶴酒造株式会社
プロジェクト番号P07018
部署名新エネルギー技術開発部
和文要約和文要約等以下本編抜粋:1.研究開発の内容及び成果等 1-1 事業概要 (1)事業の背景 日本酒は食品のような賞味期限は定められていないが、一般に殺菌処理しない日本酒は3ヶ月~6ヶ月、殺菌処理したものについても1年程度が限度と言われている。したがって、出荷後一定期間経過した日本酒は、品質管理の面から酒造会社が回収し、産業廃棄物として処分している。一方、廃棄日本酒には10数%のエタノール分が含まれており、これをエネルギーとして回収し、日本酒の製造ラインに使用することで、化石燃料の削減、すなわち温室効果ガス削減効果が期待できる。
英文要約Sake does not have a specified best before date such as those of foods. In general, the nonsterilized sake is said to have a best before date of 3-6 months, but the sterilized sake is said to have that of around one year. Therefore, the sake having passed the certain best before date after delivery have been collected and disposed as industrial wastes by Sake Brewing Companies. On the other hand, the waste sake contains 10-odd % of ethanol. Its collection and application to the sake manufacturing lines can be expected to create a fossil fuel reduction effect, that is, greenhouse gas reduction effect. So, we tried to reduce the fossil fuel(city gas) or reduce the greenhouse gas by utilizing a phenomenon that supersonic mist treatment of the waste sake allows the ethanol in the sake to be concentrated into the mist side in the following method - the mist-like concentrated ethanol obtained with a mist generating device is loaded directly into a boiler for direct utilization as a fuel in the boiler. At first, initially we confirmed the mist-generation amount of the mist generating device, thus having resulted in that the said amount was 4L/hr–around 12 % of the target value 33L/hr. A little mist-generation amount is considered to have been caused by a shortage of carrier gas. So the boiler burner and the pipe from the outlet of the mist generating device to the boiler burner were remodeled, thereby having reduced the resistances of the gas flows. The one-sided flow of the carrier gas in the mist generating device was improved for increasing the mist generation amount, and in addition, the control method was also modified so that the liquid depth got a certain amount of 40mmH. When opening the upper cap of the mist generating device, the mist generation amount is 26L/hr at the carrier gas amount of 120m3/hr, and it gets 30L/hr or more at 170m3/hr. The mist generation amounts did not reach the planned amount of 33L/hr, but the mist generation capacity was greatly improved. However, the mist generation amount dropped to the half at the status in which the merging unit of 2 units of mist generating device was open. This was considered to have been influenced by the fact that mist mutual-collisions caused by merging turns the mist to a drain, and reversely flows to the mist generating device. So shortening the distance from the outlet of the mist generating device to the boiler enabled the mist mutual-collisions to be avoided as much as possible. However, the reverse flows of the mist drains had remained still 50% or more, and no improvement effects were recognized. The differences in mist generation amounts of the waste sake under the same conditions were remarkable, and the mist-generating out of the waste sake caused a 50% drop of the generation amount, in comparison with that of water. Currently the capacity of the mist generating device is : mist generating amount(the waste sake)–7.4L/hr/2 units×6hr/day = 0.04m3/day; calculation on the waste sake treatment–70L/hr/2 units×6hr/day = 0.42m3/day. This year, the mist generating device installed in March, 2009 started operation. However, the capacity of the mist generation device did not reach the targeted mist generation amount(33L/hr). So various types of re- modeling were conducted, but the results were greatly lower than the targeted values.
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